On Sun, Oct 30, 2022 at 11:09:31PM +0100, net...@kapio-technology.com wrote:
> On 2022-10-25 12:00, Ido Schimmel wrote:
> > @@ -943,6 +946,14 @@ static int br_setport(struct net_bridge_port *p,
> > struct nlattr *tb[],
> >     br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
> > BR_NEIGH_SUPPRESS);
> >     br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
> >     br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED);
> > +   br_set_port_flag(p, tb, IFLA_BRPORT_MAB, BR_PORT_MAB);
> > +
> > +   if ((p->flags & BR_PORT_MAB) &&
> > +       (!(p->flags & BR_PORT_LOCKED) || !(p->flags & BR_LEARNING))) {
> > +           NL_SET_ERR_MSG(extack, "MAB can only be enabled on a locked port
> > with learning enabled");
> 
> It's a bit odd to get this message when turning off learning on a port with
> MAB on, e.g....
> 
> # bridge link set dev a2 learning off
> Error: MAB can only be enabled on a locked port with learning enabled.

It's better if you suggest something else. How about:

"Bridge port must be locked and have learning enabled when MAB is enabled"

?

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